Sheriff Mike Williams said in a press conference the members from the Problem Child Entertainment gang were arrested Nov. 10, concluding the case.

The long-term investigation involved multiple investigation units, including the Jacksonville Sheriff's Office and the Florida Department of Law Enforcement, the State Attorney's Office and the Federal Bureau of Investigation.

The investigation of the Northwest Jacksonville gang began in the Summer of 2014 when there had been dozens of firearm-related incidents, including multiple murders, Williams said.

"This investigation shows the commitment we share with our law enforcement partners to reduce violent crime in our community using a laser-focused approach to concentrate on a very small percentage of prolific offenders that we know who are committing the majority of violent crime in our community," Williams said. "Our community has had enough."